A Wake County teenager, who contracted measles while traveling in Europe, has just been released from isolation.

The teen has not been identified and health officials would not say how long he was in isolation.

People are placed in isolation when they are contagious and considered a public health threat.

Wake County Health officials are focusing their efforts on people he came in contact with who have not been immunized.

The virus can be deadly and is highly contiguous.

"The risk is pretty high. If you put ten people in a room who are not vaccinated and you put someone with measles in the room with them, nine of the people will get sick," said Wake County Medical Director Dr. Kimberly McDonald.